Door-frame for silos.



D. W. OSBORN.

DOOR FRAME FOR SILOS.

APPLICATION FILED APR.17, 191a.

Patented Jan. 13, 1914.

mvamto-z $071 Z0 Osborn if W Z E I r6 GHOZ liQijA ATENT OFFICE.

DOOR-FRAME FOR SILOS.

wearer.

Specification of Letters Patent.

Patented Jan. 13, 1914.

Application filed April 17, 1913. Serial No. 761,711.

frame of said silos.

The object of the invention is to provide an improved structure of this character in which, while the door frame proper is made of metal and is constructed in such manner as to tie the concrete walls upon each side of the door frame together, such metal is protected from contact with the juices of the ensilage.

It is a further object of the invent-ion to so arrange the door frame with relationto the concrete walls of the silo that the doors carried by the door frame and the inner face of the silo wall will present a continuous and unbroken surface.

It is a further object of the invention to provide rungs, some of which are carried b gthe doors and some of which are carried by the cross members of the door frame, to thereby complementally form a ladder.

It is a further object of the invention to construct the door frame of metallic members so that comparatively narrow members may be used and still supply the requisite strength by virtue of which construct on the distance from one door to the other is rendered a very short one so that at no time 1s it necessary to throw the ensilage over a wall of considerable height.

Further objects and advantages of the invention will be set forth in the detailed description which now follows:

In the accompanying drawing, F1gure 1 is a perspective view of a portion of a 5110 door frame constructed in accordance with the invention, and Fig. 2 is a partial horiand consequently these metallic bars are pro tected from the action of such juices. It

zontal section therethrough illustrating in conjunction therewith, the silo wall upon one side of the door frame.

Like numerals designate corresponding parts in both of the figures of the drawing. Referring to the drawing, it will be seen that the improved door frame comprises vertical metallic bars 5 and horizontal metallic bars 6 which are united to vertical bars 5 by fastening devices-indicated at 7. The ends of the cross bars 6 are extended beyond the vertical bars 5 and are crimped-asat-B.

It will be noticed that the first bend of the crimp (see Fig. 2) is an inward bend, that is, a bend toward the plane of bars 5, by virtue of which the crim ed portions are caused to lie in the plane 0 the bars 5 and 6. These crimped portions are embedded in the concrete walls 9 of the siloand serve to tie these walls together while at the same time they serve to anchor the door frame in position with relation to the body of the silo. The fastening devices 7 also traverse vertically disposed wooden bars 10 and se cure these bars 10 to the bars 5. Wooden cross bars 11 extend between the vertical wooden bars 10 and in conjunction with said bars 10 complete the door ways that are filled by doors 12. These doors carry side vertical battens 13 and central vertical battens 14 and to the central vertical batten of each door is secured an oscillatory disk 15 having an operating handle 16 and having pivoted thereto the ends of bolts 17 These bolts have slidable movement through keepers 18 and are provided with offset ends 19 whiclrhave wedging engagement over the bars 6 whereby the door may be locked in position.

Extending between and carried by the side battens 18 are the rungs 20 which, together with rungs 21, carried by the cross bars 6, form a ladder-like structure.

By referring to Fig. 2, it will be seen that the vertical wooden bars 10 are of slightly less width than the vertical metallic bars 5 and that those portions of the metallic bars 5 that project beyond the wooden bars, are embedded in the concrete. By virtue of this construction, the concrete is brought into tight engagement with the wooden bars and when these bars become moist and swell, the resultant joint is sufficiently tight to prevent the passage of the juices of the ensilage to the metelli: bars will also be seen that the parts have been so arranged with relation to each other that while the cross bars 6 are centrally arranged with relation to the concrete walls to there by secure the best anchoring efi'ect, the inner faces of the doors lie flush with the inner faces of the concrete walls to thereby provide an unbroken surface which is of great advantage in a structure of this character.

From the foregoing description, it will be seen that simple and efiicient means are herein provided for accomplishing the objects of the invention, but while the elements shown and described are well adapted to serve the purposes for which they are intended, it is to be understood that the invention is not limited to the precise construction set forth, but includes within its purview such changes as may be made within the scope of the appended claims.

Having described my invention, what I claim is:

1. In a silo construction, the combination with a concrete body, of a door frame therefor constructed of vertical metallic bars spaced from each other and uniting cross bars which terminate in crimped portions, said crimped portions being embedded in and uniting the concrete walls of the silo upon opposite sides of the door-way.

2. In a silo construct-ion, the combination with a concrete body, of a door frame therefor constructed of vertical metallic bars spaced from each other and uniting cross bars which terminate in crimped portions, said crimped portions being embedded in and uniting the concrete walls of the silo upon opposite sides of the door-way, and said crimped portions lying within the plane of the body portions of the cross bars and the vertical bars.

3. In a device of the character described, a door frame formed of spaced vertical metallic bars and uniting cross bars, in combination with vertically disposed wooden bars of less width than the vertical metallic bars, those portions of the metallic bars extending beyond said wooden, bars being embedded in the concrete walls of the silo and said concrete walls closely abutting said wooden bars. I

4. In a silo construction, the combination with a concrete body, of a door frame therefor comprising a pair of vertical metallic bars spaced from each other and uniting rigid cross bars,.the terminal ends of which project beyond said vertical bars, said ter-' minal ends being embedded in the concrete walls of the silo upon opposite m'des of the doorway and comprising fixed portions 1which resist endwise movement of said cross ars.

In testimon whereof I afiix my signature in presence 0 two witnesses.

DON W. OSBORN. Witnesses:

Gno. H. Honors, JOHN N. HoUcK. 

